Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e82d079685fbae…

MALICIOUS

PDF

52.4 KB Created: 2020-08-19 10:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ed1edb87c7990e4a642758be1445eb SHA-1: b59234dd8f411eeae3e28db8f522c954412e6b34 SHA-256: b7e82d079685fbaedd9ac526ff710db9afa345bc78454f9aab5da52ee9e54eac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a document about student report cards. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, many pointing to Shopify domains, suggests a link farm or content distribution network used for hosting malicious files. The primary malicious IOC is the ttraff.cc redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=general+comments+for+students+report+cards
    • http://powaw.shelter-share.org/uploads/1/3/1/4/131407315/8370413.pdf
    • http://files.tracygreenhalgh.com/uploads/1/3/1/4/131438038/6070081.pdf
    • http://files.pgvisas.ca/uploads/1/3/1/8/131858287/6347494.pdf
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/history_of_behaviour_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/dipefusulemoseseje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/80761111213.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/fijoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/78921501667.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/xepanulawefavewof.pdf
    • https://cdn.shopify.com/s/files/1/0439/7383/6958/files/762402936.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5020/files/32566588196.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/newemudoduguranefoxaj.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/9790649535.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a91.bin
4128e537699f66fabda40da55dff544ad6d55ab211c0c0add4f3ced80a06f34b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 5332 bytes
font_01_sfnt_off00008c99.bin
4f99900f7e80021befa6a8d98eff602efe456f31d9384c50256f06b602f05f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 10044 bytes
font_02_sfnt_off0000af16.bin
0646a63a478fe53468b8dbbe05b608d617a04836cde27f490c8d0ce00ae8a9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF16 16164 bytes

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